Finding the Fourth Proportional to 1,178,111.88, 1,766,642.94 and 429,633

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178,111.88 : 1,766,642.94 = 429,633 : x
2. Step 2: Convert to fraction form
   1,178,111.88/1,766,642.94 = 429,633/x
3. Step 3: Cross multiply
   1,178,111.88x = 1,766,642.94 × 429,633
4. Step 4: Simplify right side
   1,178,111.88x = 759,008,106,241.02
5. Step 5: Solve for x
   x = 759,008,106,241.02/1,178,111.88
6. Step 6: Final answer
   x = 644,258.09